Ke hōʻike ka ʻenekinia i kahi ʻāpana incoloy no ka laina corrosive, ʻo ka koho ma waena o Alloy 825 a me Alloy 800 he mea maʻamau e pili ana i ka mea i ʻoi aku ka maikaʻi. E pili ana ia i ka alloy i kūpono i nā kūlana lawelawe maoli. Ua hoʻolālā ʻia ʻo Incoloy 825 (UNS N08825) no ka hoʻohaʻahaʻa ʻana i nā ʻakika, ka media chloride-bearing, a me nā kaiapuni kinoea ʻawaʻawa. Ua hoʻolālā ʻia ʻo Incoloy 800 (UNS N08800) no ka ikaika wela kiʻekiʻe a me ka pale ʻana i ka oxidation, me ka hana corrosion i loko o ka media aqueous ma ke ʻano he pōmaikaʻi lua. ʻO ka huikau ʻana i nā mea ʻelua hiki ke alakaʻi i ke kumu kūʻai pono ʻole a i ʻole kahi huila i kūpono ʻole i nā koi lawelawe.
Ua kākau ʻia kēia hoʻohālikelike no nā mea ʻenekinia, waho, a me nā mea hoʻololi wela a me nā mea kūʻai aku e pono ana i kahi papa hana koho kūpono, ʻaʻole i kahi puke paʻa waiwai. Hoʻopili ia i ka logic metallurgical ma hope o kēlā me kēia huila, ʻo ka ʻāpana i kahi i koho nui ʻia ai, a me ka hana ʻana a me nā wahi kūʻai e hoʻoholo ai inā hana maoli ka alloy i ʻōlelo ʻia ma ka lawelawe.
Incoloy 825 vs 800: ʻO ka ʻokoʻa kūlana
ʻO ke ala maʻalahi loa e hoʻopaʻa i ka ʻokoʻa: ʻO Alloy 825 ka corrosion-mua; ʻO Alloy 800 ka wela-mua.
No ka ʻohana Ni-Fe-Cr-Mo-Cu ka Alloy 825. Aia kona ʻike nickel i ka 38-46%, me ka hoʻohui ʻia o ka molybdenum (2.5-3.5%) a me ke keleawe (1.5-3.0%), me ka hoʻokū ʻana o ka titanium. Ua hoʻokumu ʻia kēia hui ʻana no ka mālama ʻana i nā ʻakika oxidizing a me ka hoʻohaʻahaʻa ʻana, e pale aku i ke koʻikoʻi o ka chloride corrosion crack, a e ʻae i nā kūlana lawelawe ʻawaʻawa me ka H₂S.
ʻO Alloy 800 kahi huila Ni-Fe-Cr me ka 30-35% nickel a me 19-23% chromium, akā ʻaʻohe molybdenum i manaʻo ʻia a ʻaʻohe hoʻohui keleawe. ʻO kāna manaʻo hoʻolālā he lawelawe wela kiʻekiʻe: pale ʻana i ka oxidation, pale ʻana i ka carburization, a me ka ikaika kolo i nā mahana a hiki i 593 ° C no ka papa kumu 800, me 800H a me 800HT e hoʻonui i kēlā laula. I loko o ka pāpaʻi hoʻoheheʻe wai me ka ʻole o ka chloride koʻikoʻi a i ʻole ka hōʻemi ʻana i ka hoʻolaha ʻana i ka waika, 800 ka hana kūpono, akā ʻoi aku ka liʻiliʻi o kona pale ʻana ma ka hoʻolālā ʻana.
No kahi ʻāpana incoloy ma kahi laina kaʻina hana kemika e lawelawe ana i ka ʻakika sulfuric me nā chlorides, ʻo 825 ka kikoʻī kūpono. No ke kākoʻo kapuahi a i ʻole ke apo hoʻohui wela kiʻekiʻe, ʻo 800 ka mea kūpono a ʻoi aku ka waiwai. Pono ka hoʻoholo e hahai i ka mīkini hoʻohaʻahaʻa nui, ʻaʻole i ka inoa nui o ka alloy.
Mechanisms Composition and Corrosion Resistance Mechanisms
He aha ka Nickel, Chromium, Molybdenum, a me Copper
ʻAʻole ka hopena o ka corrosion o Alloy 825 i ka hopena hoʻokahi. Hoʻopuka kēlā me kēia hoʻohui alloying i kahi ʻano hemahema.
Hāʻawi ʻo Nickel i ke kumu no ke kū'ē ʻana i ka chloride stress corrosion cracking (SCC). Ua lawa ka 38–46% nickel range ma 825 e pale aku i ka chloride-ion SCC ma nā wahi he nui. Hāʻawi pū ka Alloy 800 nickel content (30–35%) i ke kūpaʻa SCC pono i loko o nā media wai he nui, akā ʻo ka nickel kiʻekiʻe ma 825 hāʻawi i kahi palena ākea i ka lawelawe chloride koʻikoʻi.
Hoʻokumu ʻo Chromium i ke kiʻiʻoniʻoni pasive oxide e pale aku i nā mea hoʻoheheʻe e like me ka waikawa nitric a me nā paʻakai oxidizing. ʻO ka 800 a me ka 825 ke hilinaʻi nei i ka chromium no kēia hana, a aia nā mea ʻelua ma kahi o 19–23.5% Cr.
ʻO Molybdenum kahi e hoʻokaʻawale loa ai nā ʻelua. Hoʻonui ka 2.5–3.5% Mo i ka 825 i ke kūʻē ʻana i ka lua a me ka ʻāʻī ʻana, ʻoi aku ka nui o nā kaiapuni chloride. ʻAʻohe hoʻohui molybdenum i manaʻo ʻia i loko o Alloy 800. ʻAʻole kēia he hemahema i ka hoʻolālā o 800; hōʻike wale ia ʻaʻole i hoʻokumu ʻia ʻo 800 no ke kūpaʻa chloride pitting.
ʻO ke keleawe, aia ma 1.5–3.0% ma 825, hana pū me ka molybdenum e pale aku i ka hoʻohaʻahaʻa ʻana i nā waikawa, ʻoi aku ka sulfuric a me ka phosphoric acid. Alloy 800 ʻaʻohe hoʻohui keleawe. Ma ka lawelawe ʻana i ka waika sulfuric dilute, ʻo ka maʻiʻo keleawe o 825 ke kumu nui i kuhikuhi ʻia ma kahi o 800 ʻaʻole.
ʻO ka Titanium ma 825 he mea hoʻokūpaʻa, hoʻopaʻa i ke kalapona e pale i ka ua chromium carbide i ka wā wili a hōʻemi i ka pilikia sensitization. ʻO kēia ke kumu i wehewehe ʻia ai ʻo 825 me ke kūʻē ʻana i ka corrosion intergranular i ke kūlana as-welded.
He aha ka 800's Lack of Mo and Cu Means in Practice
ʻAʻole pono e hoʻokuʻu ʻia ʻo Alloy 800 ma ke ʻano he "ʻoi aku ka pale ʻana i ka corrosion" i kēlā me kēia pōʻaiapili. I loko o nā lewa hoʻonanea kiʻekiʻe, ʻo ka 800's chromium content a me ka nickel balance e hāʻawi i ka oxidation maikaʻi loa a me ka pale ʻana i ka carburization, ʻo ia ke kumu e noho mau ai ia i mea maʻamau no ka reformer a me nā ʻāpana umu. Hāʻawi ka huila i ke kūpaʻa ʻino maʻamau i ka nui o nā pāpaʻi wai a kūʻē i ke koʻikoʻi i ka pohā ʻino i nā wahi he nui.
Hōʻike ʻia ka palena inā loaʻa nā chlorides a me ka hoʻohaʻahaʻa ʻana i ka waika i loko o ke kaiapuni lawelawe, a i ʻole he mau mea hoʻoweliweli ʻoiaʻiʻo ka lua a me ka corrosion. I kēlā mau kūlana, ʻo ka nele o 800 o ka molybdenum e haʻalele iā ia i ka hoʻouka kaua kūloko i hoʻolālā ʻia e 825 e kūʻē. ʻO ka hana hoʻokolohua ma nā ʻāpana preheating me ke kiʻekiʻe o ka chloride neʻe (5,500 ppm Cl⁻) ma ka wela kiʻekiʻe i ʻike ʻia ua hōʻike ʻo Incoloy 800 i ka ʻinoʻino pitting ʻoiai ʻo Incoloy 825 i hōʻike ʻole i ka ʻino kino nui ma lalo o nā kūlana like. ʻO kēia ʻano hōʻike hoʻohālikelike, ʻoiai kikoʻī i ke kaiapuni hoʻāʻo, hōʻike i ka hopena kūpono o ka ʻokoʻa haku mele.
No kahi ʻāpana incoloy i loko o kahi mea hoʻololi wela i hoʻoluʻu ʻia i ke kai, pono kēia ʻokoʻa. Hoʻohui ka wai kai i ka chloride, hoʻohaʻahaʻa i nā kūlana mai ka hana olaola, a me nā māwae ma nā flanges a me nā ami tube-to-tubesheet. Hoʻopili pololei ʻo Alloy 825's Mo a me Cu i kēia mau hana. ʻAʻole hiki i ka Alloy 800.
Nā ʻāpana ʻāpana Incoloy maʻamau a me nā hiʻohiʻona noi
Noho nā mea holoi ma kahi wahi kala ʻole ʻia i loko o kahi hui paʻa: ua hoʻopaʻa ʻia lākou ma waena o ʻelua mau ʻāpana, e hana ana i kahi ʻāpana kahi e hiki ai i ka hoʻopau ʻana o ka oxygen a me ka ʻike chloride ke hoʻoikaika i ka hoʻouka ʻana. I ka lawelawe ʻana i ka chloride, pono e kūʻē ka mea holoi lole i ka corrosion maʻamau a me ka corrosion crevice i ka wā e mālama ana i ka preload.
ʻO nā mea holoi Alloy 825 ka kikoʻī kūpono no nā pili flanged i loko o ke kinoea ʻawaʻawa, ka wai kai, a me nā ʻōnaehana hoʻokele wai. Hāʻawi ka ʻike molybdenum i ka pitting a me ka crevice corrosion resistance ʻaʻole hiki iā 800 ke hoʻohālikelike. No ke kinoea puhi wela a i ʻole ka umu ahi kahi i loaʻa ʻole ai nā chlorides a ʻo ke kūpaʻa wela ka mea nui, hiki ke noʻonoʻo ʻia nā mea holoi 800.
Hoʻokahi memo kūpono mai ka ʻike mīkini: Paʻa nā huila Incoloy i ka wā o ka huli ʻana a me ka wili ʻana, a ʻoi aku ka kiʻekiʻe o ka paʻakikī hana no 825 ʻoiai ʻoi aku ka haʻahaʻa ma mua o nā kila stainless austenitic maʻamau. Hiki i nā mea holoi lole lahilahi ma lalo o ka 1.5 mm hiki ke ho'opō'ino i ka wā e mālama ai i ka wela ke 'ole i kāko'o 'ia e ka ho'oponopono pono. ʻO ka ʻōwili ʻia ʻana o ka milo ma mua o ka paʻi ʻana i makemake pinepine ʻia no ka hoʻolālā ʻana o ka mea holoi wili i loko o ka lawelawe chloride, no ka mea hiki ke hoʻokomo i ka pōʻino ʻili lalo i lilo i wahi hoʻomaka no ka haki ʻana o ke koʻikoʻi. Palapala hōʻoia: Hōʻike kēia alakaʻi hana i ka hana machining maʻamau no nā huila Incoloy; pono e hōʻoia ʻia nā ʻāpana kikoʻī me ka mea hana maoli.
Nā ʻāpana Incoloy Tube a me nā ʻāpana hoʻololi wela
Ua uhi ʻia ʻo ASTM B423 / ASME SB423 i ka paipu maʻemaʻe a me ke anu i UNS N08825 no ka lawelawe corrosive maʻamau. I loko o nā paipu hoʻololi wela, ʻo ke koho ʻana ma waena o 825 a me 800 e hahai maʻamau i ka ʻaoʻao ʻaoʻao a i ʻole kemika ʻaoʻao paipu.
Inā lawe ka ʻaoʻao o ka paipu i ka wai hoʻoluʻu me nā chlorides, a i ʻole i loko o ka wai kaʻina hana i nā waikawa hoʻohaʻahaʻa, hāʻawi ka pahu 825 i ka hāʻawi Mo a me Cu e pono ai ke pale aku i ka pitting a me ka hoʻouka ʻana i ka waikawa. Inā he kiʻekiʻe-mehana reformer a i ʻole pyrolysis furnace kahi i ʻoi aku ka mahana o ka metala ma mua o 600 ° C a maloʻo maoli ka honua a i ʻole oxidizing, 800H a i ʻole 800HT tube ka koho maʻamau.
Pono ka nānā ʻana i kahi hiʻohiʻona waena: nā mea hoʻololi wela me ke kaʻina hana ma kahi o 400-500°C a me nā pae chloride haʻahaʻa. ʻAʻole kekahi alloy he pane ākea ma aneʻi. Pono ka hoʻoholo e hoʻoholo inā hoʻokumu ka chloride concentration a me ka geometry crevice i kahi SCC hilinaʻi a i ʻole pitting risk. Inā ʻae, hāʻawi ka nickel kiʻekiʻe o 825 a me ka molybdenum i kahi palena palekana ākea.
ʻOki ʻo Valve a me nā mea mīkini
ʻIke ʻia nā poʻe o loko o ka valve i ka erosion-corrosion, ka hoʻouka ʻana i ka ʻāwaha ma nā wahi e hoʻopaʻa ʻia ai, a ma ka lawelawe ʻawaʻawa, ka haki ʻana i ke koʻikoʻi sulfide. Hoʻohana ʻia ka Alloy 825 ʻoki i loko o ka lawelawe letdown acid a me ke kinoea ʻawaʻawa kahi e pili ai ka hui ʻana o Mo no ke kū ʻana o ka pitting a me Ni no ke kū'ē SCC. ʻAʻole maʻamau ka Alloy 800 i ka lawelawe valve corrosive pulu akā ʻike ʻia i loko o nā noi kiʻekiʻe-mehana flue gas a me ka umu ahi.
Palapala hōʻoia: Pono e hoʻopaʻa ʻia ka laulā huahana i loaʻa mai ka pūnaewele ma mua o ka hōʻike ʻana i ka loaʻa ʻana o ka ʻoki valve a i ʻole nā mea ʻē aʻe mīkini ʻāpana Incoloy ma mua o nā mea holoi. Inā pili ka hāʻawi ʻana o ka pūnaewele i nā mea holoi, pono e heluhelu ʻia kēia ʻāpana ma ke ʻano he noi noi ma mua o kahi koi huahana.
Papa Hooholo Koho: Ma ka Medium a me ka Mahana
Hoʻopili ka papa ma lalo nei i ka loiloi koho i nā kūlana i loaʻa pinepine ʻia e ʻāpana incoloy nā mea kūʻai. Manaʻo ʻo ia he ʻāpana paʻa a mīkini ʻia paha ka ʻāpana (washer, tube, fitting, trim) a ʻo ka mea e hopohopo nui ai ʻo ia ka ʻino wai ke ʻole i ʻike ʻia.
| Kūlana lawelawe | Paipai ʻia ʻo Alloy | Kumukumu |
| ʻO ka ʻakika Sulfuric (hōʻemi), me nā chlorides, >60°C | 825 | Kūʻē ʻo Cu + Mo i ka ʻakika hoʻēmi; Kūʻē ʻo Ni i ka chloride SCC |
| ʻO ka waikawa Phosphoric, i haumia me nā chlorides | 825 | ʻO ka hoʻohui Cu e hoʻopili i ka waikawa phosphoric; ʻAʻole ʻo Mo i ka lua |
| ʻO ka wai kai a i ʻole ka brine, stagnant a creviced | 825 | Hāʻawi ʻo Mo i ka pale ʻana i ka lua/crevice; 800 nele Mo |
| ʻO ke kinoea ʻawaʻawa (H₂S) me nā chlorides, pilikia ka pohā i kēlā me kēia ʻāpana NACE MR0175 | 825 | Hoʻopaʻa inoa ʻia ma NACE MR0175 no ke kūʻē ʻana i ka hana ʻawaʻawa; hui pū ʻo Ni + Mo |
| Oxidizing acid (nitric), ʻaʻohe chlorides, haʻahaʻa haʻahaʻa | 800 a i ʻole 825 | Ke hilinaʻi nei lāua ʻelua ma Cr passive film; ʻO 800 ka uku haʻahaʻa |
| ʻO ka oxidation / carburization kiʻekiʻe,> 600 ° C, maloʻo | 800 / 800H / 800HT | Ka ikaika a me ke kūpaʻa kiʻekiʻe; ʻAʻole i manaʻo ʻia ʻo 825 no kēia pae |
| E hoʻoheheʻe i ka chloride, haʻahaʻa wela, ʻaʻohe māwae | Ua lawa paha ka 800 | Hāʻawi ka 800's Ni content i ka pale SCC i nā kūlana haʻahaʻa; He haʻahaʻa ka pilikia o ka lua me ka ʻole o nā māwae |
palena nui ma NACE MR0175: Hōʻike kēia maʻamau i ke kūʻē ʻana i ka haki ʻana i ke koʻikoʻi sulfide a wehewehe i nā mea i ʻae ʻia no ka lawelawe ʻo H₂S. ʻAʻole ia e hoʻokumu i nā palena corrosion lua a māwae paha. ʻO kahi mea i helu ʻia ma MR0175 ʻaʻole "kūʻokoʻa piha" no nā kūlana ʻawaʻawa a pau; 'o ia ho'i, ua ho'okō 'ia ka mea i nā koi kū'ē māhā i loko o ka laulā i wehewehe 'ia. No ka 825 i loko o ka brine ʻawaʻawa me ka chloride kiʻekiʻe, pili mau ke kūpaʻa pitting i ka ʻike Mo a me ka mahana maoli a me ka ʻike chloride. Ma ka lawelawe ʻawaʻawa kiʻekiʻe-chloride, ʻo ka hoʻokō MR0175 kahi hoʻomaka, ʻaʻole kahi loiloi corrosion piha.
Noonoo hana a me ke kuai ana
Ka Hooikaika a me ka Mkinikini
ʻOi aku ka wikiwiki o ka huila 825 a me 800 ma mua o nā kila stainless austenitic. No ka 825 kiko'ī, ʻoi aku ka haʻahaʻa o ka paʻakikī o ka hana ma mua o nā māka stainless austenitic maʻamau akā ʻoi aku ka kiʻekiʻe, a pono e hoʻoikaika pono ʻia nā mea hana e uku no ka hoʻonui ʻana i ka ikaika i ka wā o ka deformation. I ka hana ʻana i ka mīkini, ʻo ka noho ʻana a i ʻole ka hamo ʻana i ka mea hana i ka ʻili e paʻakikī i ka ʻoki ʻoki a hoʻolalelale i ka ʻaʻahu. No kahi ʻāpana incoloy me nā hoʻomanawanui paʻa, e like me ka mea holoi holoi me nā koi palahalaha a i ʻole kahi kaula i hoʻopaʻa ʻia, pono ke kaʻina mīkini a me ke ala mea hana e pale i nā ala kūpono ʻole e hana i ka ʻili.
ʻAʻole kēia he manaʻo manaʻo no nā ʻāpana lahilahi. Hiki i nā mea holoi ma lalo o 1.5 mm ka mānoanoa ke hoʻololi i ka wā o ka hoʻoheheʻe ʻana a i ʻole ka mālama wela hope inā ʻaʻole i kākoʻo pono ʻia. Pono paha nā mea holoi holoi anana nui i ka helu hoʻoluʻu hoʻomalu ʻia e pale aku i ka warping lihi. ʻO kēia nā kikoʻī kikoʻī pono e kūkākūkā ʻia ma ka pae ʻōlelo, ʻaʻole i ʻike ʻia i ka wā o ka nānā ʻana i ka ʻatikala mua.
Hoʻopau ʻili a me kona hopena i ka pale ʻana i ka ʻino
Hoʻomaka ka ʻino ʻana o ka lua a me ka ʻāwī i ka hoʻopau ʻana o ka ʻili: nā ʻōpala, ka hao i hoʻokomo ʻia, ka ʻili wela mai ka wili ʻana, a me nā ʻili i hana ʻia i ka mīkini. No nā ʻāpana 825 i ka lawelawe chloride, pili pono ke ʻano o ka ili o ka sila ʻana i nā maka a me nā crevice-forming surfaces i ke ola lawelawe.
ʻO ka hoʻopau mīkini o Ra ≤ 0.8 µm ka mea maʻamau no nā ʻili pale-corrosion maʻamau. Hiki ke kuhikuhi ʻia ka Electropolishing iā Ra ≤ 0.2 µm no nā wahi hoʻopaʻa paʻa koʻikoʻi i ka lāʻau lapaʻau a i ʻole ka hoʻomaʻemaʻe kiʻekiʻe, kahi e koi ʻia ai ka pale ʻana i ka corrosion a me ka maʻemaʻe. No nā mea holoi i ka wai kai a i ʻole lawelawe ʻawaʻawa, ʻoi aku ka nui o ka wehe ʻana i ka ʻili wela a me ka hōʻoia ʻana i kahi maʻemaʻe, passive ma hope o ka mīkini ʻana ma mua o ka loaʻa ʻana o kahi helu Ra haʻahaʻa loa.
Nā hōʻoia maʻamau a me ka hōʻoia
I ke kūʻai ʻana i kahi ʻāpana incoloy, pono e hōʻoia ʻia ka palapala hōʻoia e pili ana i ka helu UNS i kuhikuhi ʻia a me ke kūlana kūpono.
- Huina 825: UNS N08825. Hiki ke kuhikuhi ʻia ka paipu a me ka paipu i ka ASTM B423 / ASME SB423. Hāʻule nā pahu a me nā palapala forged ma lalo o nā kikoʻī like ʻole ma muli o ke ʻano huahana. Pono e hōʻike maopopo ʻia ka hoʻokō NACE MR0175 ma ka palapala hōʻoia inā koi ʻia ka lawelawe ʻawaʻawa.
- Huina 800: UNS N08800 (a i ʻole N08810/N08811 no 800H/800HT). ʻOkoʻa nā kūlana huahana ma ke ʻano; ʻO ka pahu pahu, ka pā, a me nā forgings he ʻokoʻa ka uhi ASTM.
Hōʻike ka ʻaoʻao huahana mea holoi Incoloy o ka pūnaewele i ka hiki ke hana i nā mea holoi Incoloy i nā ʻae a me ka hoʻopau ʻana i ka ʻili. No nā ʻano ʻāpana ʻē aʻe, e like me ka paipu a i ʻole nā mea hana maʻamau, pono e hōʻoia pololei ʻia ka pae hana i loaʻa ma mua o ka manaʻo ʻia mai ka ʻaoʻao holoi.
FAQ
ʻO Incoloy 825 ka koho maikaʻi loa no ka lawelawe corrosive i hoʻohālikelike ʻia me 800?
ʻAʻole. ʻO Alloy 825 ka koho ʻoi aku ka maikaʻi inā pili ka lawelawe i nā chlorides, hoʻohaʻahaʻa i nā waikawa, a i ʻole kinoea ʻawaʻawa, no ka mea, ʻo kāna mau hoʻohui Mo a me Cu ke kuhikuhi i kēlā mau mīkini. ʻOi aku ka maikaʻi a ʻoi aku ka maikaʻi o ka Alloy 800 no nā wahi hoʻonaninani kiʻekiʻe a i ʻole ka carburizing kahi e hoʻokele ʻia ai ka ʻinoʻino e ka wela ma mua o ke kemika wai. ʻO ka hoʻohana ʻana i ka 825 i loko o kahi noi kapuahi kiʻekiʻe e hoʻonui i ke kumukūʻai me ka ʻole o ka hoʻohui ʻana i ka hana.
Hiki ke hoʻohana ʻia nā mea holoi ʻo Incoloy 800 i nā flanges wai kai?
ʻAʻole ʻōlelo ʻia. Hoʻokumu ka wai kai i nā kūlana ʻāwīwī ma nā maka holoi a me nā pae chloride e hāpai ana i ka lua. ʻAʻole i loaʻa i ka Alloy 800 kahi hoʻohui molybdenum i manaʻo ʻia, ʻo ia ka mea hoʻohui mua no ka pale ʻana i ka pale ʻana i ka media chloride. Hāʻawi nā mea holoi Alloy 825 i ka ʻike Mo e pono ai no kēia lawelawe.
He aha ke ʻano o ka ʻae ʻana o NACE MR0175 no kahi ʻāpana Incoloy 825?
ʻO ia ke ʻano o ka mea e hoʻokō ai i nā koi o ka maʻamau no ke kūʻē ʻana i ka haki ʻana i ke koʻikoʻi sulfide ma nā kaiapuni H₂S i loko o ke ʻano i wehewehe ʻia o ka maʻamau. ʻAʻole ia e hōʻoia i ke kūʻē ʻana i ka lua, ka ʻinoʻino, a i ʻole ka pohō kaumaha nui. Hiki i kekahi ʻāpana ke hoʻokō i ka MR0175 a e ʻeha mau ana i ka lua ʻana i loko o ka brine ʻawaʻawa kiʻekiʻe-chloride inā ʻaʻole kūpono ka ʻike Mo a me ke ʻano o ka ʻili no nā kūlana kikoʻī.
Ua uhi anei ʻo ASTM B423 i nā mea holoi Incoloy 825?
ʻAʻole. ASTM B423 uhi i ka paipu ʻole a me ka paipu ma UNS N08825. Kūʻai pinepine ʻia nā mea holoi a me nā ʻano mīkini ʻē aʻe e kūʻē i kahi palapala hōʻoia e hōʻike ana i ka helu UNS a me ke kemika ma mua o ke ʻano huahana no nā mea holoi. Pono ka palapala hōʻoia e hōʻoia i ka kemika N08825 a me ka hoʻokō NACE pono.
No ke aha he mea nui ka hoʻopau ʻana o ka ʻili no kahi ʻāpana Incoloy i ka lawelawe chloride?
Hoʻomaka nā lua i nā hemahema o ka ʻili kahi e ʻokoʻa ai nā chlorides a me ka loaʻa o ka oxygen i ʻokoʻa mai ke kaiapuni nui. ʻO ka ʻili i hana ʻia e ka mīkini, ka ʻili wela, a i ʻole nā mea ʻē aʻe i hoʻokomo ʻia e hana i nā wahi hoʻomaka. No ka 825 i loko o ka wai kai a i ʻole ka ʻawaʻawa ʻawaʻawa, e kuhikuhi ana i kahi maʻemaʻe a i hoʻopaʻa pono ʻia ma luna o ka sila a me nā ʻaoʻao e kū pono ana he ala kūpono ia e kākoʻo ai i ke kūpaʻa ʻana o ka alloy.
Hoʻohālikelike i ka Alloy i ka lawelawe
ʻO ke koho ma waena o Incoloy 825 a me 800 no kahi ʻāpana incoloy pono e hahai i ka hana hoʻohaʻahaʻa nui ma ke kaiapuni lawelawe maoli. Inā loaʻa nā chlorides, nā ʻakika hoʻohaʻahaʻa, a i ʻole H₂S a e hana ana ka ʻāpana i kahi wai wai a pulu paha, ʻo ka molybdenum, keleawe, a me ka nickel 825 e hoʻoponopono i kēlā mau hoʻoweliweli kikoʻī. Inā he kiʻekiʻe ka wela o ka oxidation, carburization, a i ʻole lawelawe kapuahi maloʻo, 800 a i ʻole kona mau ʻano ikaika kiʻekiʻe ka ʻohana kūpono.
No nā mea holoi holoi a me nā ʻāpana mīkini i ka lawelawe corrosive, pono e helu ka hoʻoholo koho no ka geometry crevice, ka pau ʻana o ka ʻili, a me nā kikoʻī hana e hoʻoholo ai i ka hana ʻana o ka alloy i kuhikuhi ʻia e like me ka mea i manaʻo ʻia. Hiki ke hāʻule ka mea holoi holoi 825 i hōʻoia ʻia me ka pau ʻole o ka ʻili i ka lawelawe chloride e like me ka mea holoi holoi 800 i hoʻopau pono ʻia ʻaʻole hiki ke pani i ka 825 kahi e pono ai ka molybdenum.
No ka nānā ʻana i nā kikoʻī o ka mea holoi Incoloy i loaʻa, me nā māka waiwai, nā ʻae ʻana, a me nā koho hoʻopau ʻili, e kipa i ka ʻaoʻao huahana Incoloy washer. No nā ʻāpana ʻāpana ma mua o nā mea holoi holoi, e hōʻoia pololei i ke ʻano hana o kēia manawa ma mua o ka wehewehe ʻana.
